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Some Common (And Not So Common) Posterior
Segment Observations and their Management
Joseph P. Shovlin, OD, FAAO
Introduction: Assorted retinal and optic nerve findings can signal systemic
disease or medication toxicity. Many of these manifestations can bring attention
to serious, even potentially life threatening conditions. Appropriate differentials
are important to help direct adequate therapy and management strategies.
Several different case presentations will be shared that range from vasculopathy
to retinal toxicity due to commonly used systemic medications. Several examples
of employing sophisticated diagnostic testing such as specific MR imaging and
blood work will highlight the need for on-going investigation and coordination of
care with several different medical specialties.
HIGHLIGHTED CASES
Central Serous Chiororetinopathy: Exogenous Induced
Unusual Case of Photopsia and Loss of Smell
Branch Retinal Artery Occlusion Associated with Plasma Donation
Vision Loss and Patent Foramen Ovale (Septal Wall Defect)
DSUN: Cat Scratch Disease and Worm Infestation
Multiple Retinal Macro-aneurysms
Vitreomacular Traction Syndrome, Epiretinal Membrane: Full-thickness Holes,
Lamellar Holes, Pseudo-Holes and Myopic Schisis
Systemic Medication Retinal Toxicity: Plaquenil and Other Drug Toxicities
Non-arteritic Ischemic Optic Neuropathy: Sleep Apnea Connection
Stargardt’s Macular Degeneration and Stem Cell Therapy
West Nile Virus Retinopathy: The Mosquito Connection
Unilateral Idiopathic Maculopathy (UAIM) and Hand, Foot and Mouth Disease
Candida Endophtalmitis Beyond Being Immunocompromised
Acute Retinal Necrosis: Not Just with Herpes Zoster
Fuch’s Heterochromia and the Rubella Scare
I.
Central Serous Chiororetinopathy: Exogenous Induced
Case Description: 42 yo white female with confirmed myasthenia
gravis presents with ptosis that initially improved with “ice”
application and acuity loss. Her medications now include Cellsept,
oral Prednisone 80mg, and a proton pump inhibitor. Central serous
chorioretinopathy was diagnosed based a classic retinal finding of
serous detachment confirmed on OCT assessment.
CENTRAL SEROUS CHORIORETINOPATHY
Characterized by serous retinal detachment, one or more RPE
detachments and is most commonly encountered in men (6:1) ages
25-50.
Risk Factors
Use of corticosteroids (oral), Type “A” personality, Cushing’s
disease (cortisol levels).
Diagnostic Tests
OCT shows RPE detachment associated with a larger area of
retinal serous detachment. Intravenous fluorescein angiography
demonstrates a focal area of hyperfluorescence (sometimes
assumes a “smokestack” pattern).
Treatment
Spontaneous reabsorption occurs in 85% of cases, laser can be
applied in those where the sub-retinal fluid has not reabsorbed by
3-4 mos., ICG angiography guided half-fluence photodynamic
therapy with verteporfin can be employed when lesion is within 750
microns from the fovea, anti-VEGf intravitreal injections can be
considered. There may be increased risk of SRNV with laser
photocoagulation therapy.
PEARLS:
 Look carefully at the optic nerve for a congenital pit that has
leaked.
 Choroidal neovascularization is possible especially with
chronicity, so careful evaluation for signs of SRNV is prudent.
 Consider early laser therapy to larger RPE leaks seen in
association with bullous serous chorioretinopathy.
 90% of eyes regain 20/30 vision or better by 6 mos.
II.
Unusual Case of Photopsia and Loss of Smell
Case Description: 64 yo white female presents with bilateral,
central flashing lights of short duration and a generalized loss of
smell. PCP ordered an MRI of brain with and without contrast dye
that was read as normal. No additional testing was ordered.
UNUSUAL CASE OF PHOTOPSIA AND LOSS OF SMELL
Causes for entopic phenomenon: flashing lights/photopsia/phosphenes -vitreous traction/tear/break, Grave’s thyroid
ophthalmopathy, IOL dysphotopsia, melanoma, CAR retinopathy;
vascular-migraines, carotid stenosis, temporal artery inflammation;
medication related (Clomiphene citrate, quinine, digitalis, Seroquel);
and neurologic-seizure disorder, MS, temporal-occipital
lesions/aneurysm.
Adequate history should include:
Location of the flashes
Do they occur in one or both eyes?
How long do they last?
What is the color of the flashes?
Does the patient have associated eye or medical conditions?
Is the patient taking any medications?
MRA imaging may detect an aneurysm when the MR is read as
being normal. (aneurysm was missed due to movement even with
fine cuts and observer missing lesions.
III.
PEARLS:
 Consider additional tests when symptomatology warrants,
even when the insurance carrier bulks.
 MRI and MRA imaging is often not sensitive enough to
detect certain brain pathologies.
 Flashing lights may indicate neurologic concerns especially
with a normal retinal exam.

Branch Retinal Artery Occlusion Associated with Plasma
Donation
Case Description: A 27 yo female presents with a complaint of
reduced acuity and “blind spot” just off the center of her vision. She
noticed this shortly after donating plasma, something she does
twice a week for extra income. The nurse at the donation center
mentioned that her blood pressure was quite low but that it would
not impact her ability to donate plasma.
BRANCH RETINAL ARTERY OCCLUSION ASSOCIATED WITH
PLASMA DONATION
Description
Occlusion of the central retinal artery or one of its branches leads to
an acute, painless, monocular loss of vision.
Risk Factors
Hypertension, diabetes mellitus, carotid artery arteriolarsclerosis,
cardiac valve disease, hypercoagulable states
Etiology
 Embolus (calcific, cholesterol, platelet fibrin, septic, cardiac
myoma, talc/IV drug users
 Intravascular thrombosis
 Vasculitis-GCA
 Trauma
 Vasospasm
 Hypercoagulable states- antiphospholipid antibody
syndrome, oral contraceptives, polycythemia
 Other systemic conditions-collagen vascular, syphilis, sickle
cell anemia, Bechet’s
Physical Exam
Blood pressure, listen for murmurs, bruit, whitening and
opacification of the inner retina in the vascular territory affected,
embolic material may be visualized or “boxcarring”
Diagnostic Tests
CBC/platelets, ESR, C-reactive protein, fibrinogen, lipid profile,
fasting blood sugar, others tests based on suspected etiology
Diagnostic Procedures: carotid ultrasound/MRA/CTA, visual field
testing, echocardiogram, electrocardiography, temporal artery
biopsy (if GCA is suspected).
Treatment
Reduce IOP, AC paracentesis, ocular massage, thrombolytic
agents, aspirin, oral/IV steroids for GCA
Patient Monitoring
Follow for neovascularization and glaucoma, follow acuity (BRAO
may recover to a reasonable good level)
PEARLS:


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IV.
Giant cell arteritis accounts for 1-2% of cases of central
retinal artery (vasculitis etiology=no embolus seen)
IV drug use may result in artery occlusions (talc emboli)
BRAO can be asymptomatic
Vision Loss and Patent Foramen Ovale (Septal Wall Defect)
Case Description: 63 yo white male presents with a recent
bilateral reduction in acuity and a noticeable loss of peripheral
vision to the right. Visual field testing showed a right congruous
homonymous hemianopsia. An immediately obtained MRI/MRA of
the brain showed a recent infarct of the occipital lobe without any
aneurysm noted. Initial cardiac and vascular work-up including
carotid ultrasound, trans-esophageal echocardiogram and
appropriate blood-work.
VISION LOSS AND PATENT FORAMEN OVALE
Patent Foramen Ovale (PFO)
A patent foramen ovale is a defect in the septum (wall) between the
two upper (atrial) chambers of the heart. The defect is an
incomplete closure of the atrial septum that results in the creation of
a flap or a valve-like opening in the atrial septal wall. A PFO is
present in everyone before birth but seals shut in about 80%.
(http://myclevelandclinic.org/disorders/)
When blood moves from the right to left atrium, bypassing the lung
filter, if debris is present in the blood (such as small clots), it now
passes through the left atrium and can lodge in the brain, causing a
stroke, or another organ (including the eye). Fortunately, PFO
usually cause no symptoms. Far less than 1% has a stroke or other
outcome that results in a need for PFO closure (catherization).
Diagnostic Tests
Echocardiography (trans-esophageal), Doppler ultrasonography
(trans-cranial), cardiac magnetic resonance imaging, and cardiac
catherization.
Treatment
The usual care for a patient who has had a stroke is the use of
blood-thinning medications, such as aspirin or the drug warfarin or
clopidrogel. For those who can’t take blood-thinning drugs or those
who have experienced a second stroke while on blood-thinners is a
non-surgical closure of the hole (catheter based).
Pearl: Cardio-vascular evaluations such as carotid ultrasound and
echocardiography are many times negative. Echocardiogram
(including trans-esophageal) is investigator dependent and may not
detect septal wall defects. Trans-cranial Doppler is a more sensitive
measure and easier to perform for septal wall defects.
V.
Neuroretinitis: Cat Scratch Disease
Case Description: A 30 yo white male presents with reduced
acuity in one eye. He described an antecedent flu-like illness 2
weeks prior with high fever and malaise. A dilated examination
showed a neuroretinitis. After appropriate treatment the condition
and acuity fully resolved.
BARTONELLA (CAT SCRATCH) NEURORETINITS
Description
Neuroretinitis is a condition characterized by optic disc swelling and
hard exudates distributed in a star-like fashion around the fovea.
Risk Factors
History of contact with a cat or kitten.
Etiology
Bartonella henselae, syphilis, viral, toxoplasmosis, toxocariasis,
histoplasmosis, Lyme disease and systemic inflammatory
conditions such as sarcoidosis.
History
Animal contact, travel, ingestion of uncooked meat, sexual history,
systemic complaints (fever, malaise, headache, muscle ache).
Physical Examination
Optic nerve edema (color defects, reduced acuity, afferent pupil
effect, pain on eye movement), vitreous inflammation, discrete,
small yellow/white choroidal infiltrates, retinal occlusions are
possible. Patients with cat scratch may be asymptomatic or exhibit
lymphadenopathy, arthritis, meningitis, or encephalitis
Diagnostic Testing
Serology or ELISA for Bartonella henselae
Treatment
Cat scratch disease- Ciprofloxacin 750mg PO b.i.d. for 3 weeks
(also doxycycline, erythromycin, azithromycin, rifampin)
PEARLS
Neuroretinitis is characterized by optic nerve swelling and
exudative macular star. Bartonella henselae is the most common
causative organism for infectious neuroretinitis. Cat scratch can
present in asymptomatic individuals with a multifocal choroiditis.
Other causes include nematode infestation (DUSN) and Lyme
disease.
VI.
Multiple Retinal Macro-Aneurysms
Case Description: An 80 yo white female presents with markedly
reduced acuity in one eye of recent duration. She is taking multiple
medications for hypertension. Her BP on this visit was 160/98 RA.
Her retinal shows multiple macro-aneurysms with collected blood in
the macular region. She declined any surgical evacuation for blood
removal.
MULTIPLE RETINAL MACRO-ANEURYMS
Description
Acquired retinal macroaneuryms are focal dilations of retinal
arterioles within the first 3 orders of branching of the arteriole
system. Commonly found in the superiorotemporal arteriole
typically at AV crossings or arteriole bifurcation (proclivity for visual
impairment). 2 types- (1) saccular- acute decompensation with
variable degree of hemorrhage (2) fusiform- chronic exudation of
plasma constituents. Serous retinal detachment, lipid exudation,
and/or macular edema may be present.
Epidemiology
10% are multiple; 20% are bilateral.
Risk Factors
 Systemic hypertension (75%)
 Hyperlipidemia
 Cardiovascular disease
 Age (>60)
 Sex (60-80% female)
 Retinal Vein Occlusion (12X higher prevalence of
macroaneuryms in area of occluded vein)
Diagnostic Tests: OCT/IFVA, careful monitoring of BP
Differentials: diabetic retinopathy, capillary hemangioma, venous
occlusive disease, retinal telangiectasis, cavernous hemangioma,
pigment epithelial detachment, polypoidal choroidal vasculopathy
Treatment
Observation; Laser photocoagulation, pars plana vitrectomy,
surgical evacuation with tissue plasminogen activator injection
Prognosis: variable with spontaneous thrombosis and involution
with vessel kink. Vision loss is possible due to macular scarring,
vitreous hemorrhage, retinal detachment.
Pearl: ICG angiography may help in establishing the diagnosis in
the presence of significant hemorrhage.
VII.
Vitreomacular Traction Syndrome, Epiretinal Membrane: Fullthickness Holes, Lamellar Holes, Pseudo-Holes and Myopic
Schisis
Case Description: A 64 yo white male presents with gradual onset
of visual distortion and reduced acuity in one eye. His media are
relatively clear except for early lens changes. His dilated exam
shows macular pucker. An OCT (spectral domain) confirms the
macular pucker and elevation secondary to vitreous traction.
VITREOMACULAR TRACTION SYNDROME, EPIRETINAL
MEMBRANE
Description
Epiretinal membranes/ERM (also known as macular pucker,
cellophane maculopathy, and surface wrinkling retinopathy) is a
thin layer of tissue found on the surface of the retina. It’s associated
with abnormal vitreous separation and vitreomacular traction.
Although it’s bilateral in 20-30% of the cases but is asymmetric.
Approximately 20% of eyes over the age of 75 have macular
pucker.
Risk Factors
 Age
 Sex (more common in females)
 History of retinal laser, surgery or trauma or vitreous
hemorrhage
 Diabetes and vascular disease
Etiology
ERM form due to abnormal proliferation of glial cells on the surface
of the retina. Glial cells access the retinal surface following a PVD.
Traction may be responsible ultimately leading to distortion and
decreased vision.
Physical Exam
Subtle ERM may appear as an irregular reflex of the fovea. A
contracting ERM may produce striae due to traction on internal
limiting membrane and tortuosity of retinal vessels. Macular edema,
hemorrhages and cotton wool spots are possible.
Diagnostic Procedures
OCT and IVFA are useful to evaluate retian and potential for visual
consequences. A thin and irregular photoreceptor layers can be
visualized on OCT. IVFA is useful to assess for macular leakage or
capillary nonperfusion.
Treatment
If significant edema is present consider topical steroids or NSAIDs
or subtenon injection of triamcinolone. Underlying associated
conditions such as macular degeneration and diabetes should be
addressed prior to considering surgical intervention. Surgicalvitrectomy surgery with membrane peel may be necessary for
visual restoration. Intravitreal injection causing medical vitreolysis to
facilitate the release of focal vitreomacular traction is being used,
but less frequently today than a year ago. There has been some
concern raised on OCT and ERG findings following injections.
Pearls: ERM may stay dormant for years; however acute PVD or
surgery may incite contraction and cause symptoms.
VIII.
Systemic Medication Retinal Toxicity: Plaquenil and Other Drug
Toxicities
Case Description: 60 yo arthritic, obese white female taking
200mg BID of Plaquenil for 7 years presents with reduced acuity,
glare and “missing central vision”. Retinal toxicity due to long-term
plaquenil therapy is suspected.
PLAQUENIL RETINAL TOXICITY
Epidemiology
Incidence- less than 1% (0-4); less than 50 cases reported from
1960-2005
Risk Factors- daily dose, duration of treatment, age, obesity,
hepatic/renal failure, cumulative dose
Etiology-use of chloroquine or HCQ, agents bind to retinal pigment
epithelium leading to photoreceptor degeneration
Signs and Symptoms
Commonly associated conditions-intraepithelial deposits, impaired
accommodation, and cataracts (less common with HCQ).
Decreased acuity, glare, photopsia, metamorphopsia, “missing
central vision”. Macular stippling and loss of foveal reflex are early
funduscopic signs progressing to a “bull’s eye” appearance. Color
defects, acuity loss and central scotoma are relatively late findings.
Multifocal ERG testing is reliable and sensitive for early changes.
OCT Findings Distinctive abnormalities in the perifoveal
photoreceptor inner segment junction were seen with
thinning of the outer nuclear layer and loss of the photoreceptor
inner segment/outer segment junction layer. “Flying Saucer” sign
Recommendations
Annual visits with baseline acuity, dilated exam, 10-2 field and OCT
(Spectral domain). Color plates, multi-focal ERG, IFVA, and
photography are considered optional. High risk patients (daily dose
>200mg BID, duration of use >5 yrs., obesity, renal or liver disease,
age above 60,, and concomitant retinal disease)
PEARLS:
 If the drug is stopped in the pre-maculopathy stages, there is
a chance of recovery; however, most patients do not recover
vision or may even progress after drug cessation.
 Spectral domain OCT is a very sensitive assessment
measure for retinal toxicity (collapse of the retinal
photoreceptors
 Doses greater than 3mg/kg of chloroquine or greater than
6.5mg/kg of HCQ are a risk for toxicity
IX.
Non-Arteritic Ischemic Optic Neuropathy: Sleep Apnea
Connection
Case Description: 62 yo white male presents with a sudden initial
decrease in vision and afferent pupillary defect. The visual field
shows an altitudinal defect and he had a normal ESR. His blood
pressure was reduced recently by adding a third pressure lowering
medication. A peculiar eyelash ptosis was noted on physical exam.
NON-ARTERITIC ISCHEMIC OPTIC NEUROPATHY: SLEEP
APNEA CONNECTION
Symptoms/Signs
Sudden, painless loss of moderate degree, initially unilateral, but
can be bilateral. Hyperlipidemia, labile hypertension and sleep
apnea are common risks for younger patients. Age group most often
affected is 40-60.
Pale disc swelling (often segmental), afferent pupillary defect, flame
shaped hemorrhages and normal ESR are critical signs. 35% of
NAION cases are progressive (worsening up to 3-4 weeks later).
Reduced color vision, altitudinal or central field defect, optic atrophy
without cupping after the disc edema resolves. A small, congenitally
anomalous disc in the contralateral eye is found. Arteritic ischemic
optic neuropathy has to be ruled out. (CBC, ESR, CRP, even
temporal artery biopsy may be essential)
Etiology
A similar picture that looks like NAION has been described in
patients taking erectile dysfunction medications. Direct causation
has not been established.
Idiopathic: Diabetes, hypertension, hyperlipidemia, anemia,
elevated homocysteine, arteriosclerosis, posterior vitreous
separation (PVDN) and sleep apnea. Nocturnal hypotension may
play a significant role especially in patients taking blood pressure
medications. Sleep apnea may account for the nocturnal
hypotension.
Treatment
Consult the patient’s internist to rule out cardiovascular disease and
hypertension. Must rule out giant cell arteritis, compressive lesions
of the optic nerve, and inflammatory causes. A careful history is
critical (age, symptoms). A complete ophthalmic examination
including pupillary assessment, color plates, visual fields, and
dilated retinal examination. Immediate CBC, ESR, and C reactive
protein measures are essential. A temporal artery biopsy is
important if signs and symptoms warrant. Cardiovascular risks
should be addressed including close monitoring of blood pressure.
Optic nerve edema resolves within 8 weeks and nearly half of
patients may experience some improvement in vision.
X.
Stargardt’s Macular Degeneration and Stem Cell Therapy
Case Description: 27 yo white female with Stardardt’s presents
with CF in each eye. She has 2 other siblings with hereditary
macular degeneration.
STARGARDT’S DISEASE
Description
Stargardt’s disease is the most form of the juvenile macular
degeneration causing vision loss in the first or second decade.
Risk Factors


Classic disease linked to mutations in ABCR on chromosome
1p13-p21
Mutations in this gene are also linked to autosomal recessive
cone-rod dystrophy and retinitis pigmentosa
Diagnosis
Patients experience a slowly progressive vision loss. A strong
family history may not be present due to autosomal recessive
inheritance. Typical retinal changes are usually bilateral and
includes non-specific RPE mottling and may take on a “beaten
bronze” appearance, ill-defined yellow-white “flecks” (fish shaped),
and more advanced disease has a “bulls eye” or geographic
atrophy appearance.
Diagnostic Testing
Lab: Genetic testing is generally not performed for this condition
given the large gene size.
Diagnostic Procedures: IVFA reveals “dark choroid”, fundus
autofluorescence photography (hypoautofluoresecence
corresponding to RPE atrophy and surrounding small flecks of
hyperautofluorescence and multifocal ERG may show decreased
amplitudes.
Differentials





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Fundus albipunctatus
Retinitis punctate albescens
Drusen
Cone or cone-rod dystrophy
Chloroquine/hydroxychloroquine toxicity
Batten disease or Spielmeyer-Vogt syndrome
Functional vision loss
Treatment
Low vision, services for the blind
Embryonic stem cell therapy
XI.
West Nile Virus Retinopathy and the Mosquito Connection
Case Description: 38 yo female presented with a history of hospitalization
with antecedent fever and malaise and recent loss of acuity.
Symptoms/Signs: Features include a multifocal choroiditis, vitritis with
linear arrangements of active yellow lesions which later scar with pigment
deposition. Many have an asymptomatic course, but some complain of
visual disturbance. Other ocular findings include: sub-conjunctival
hemorrhage, optic neuritis, 6th nerve paresis, anterior uveitis and vasculitis.
Complications such as optic atrophy, retinal detachment are rarely seen.
Etiology: Single strand RNA flavivirus (West Nile)-birds are the natural
host, vector is the mosquito (initial outbreak 1999. Infections are common
in the western parts of the US. There are other isolated endemic areas.
Treatment: Supportive therapy. No known treatment for the systemic viral
disease. Steroids can be used to blunt the inflammation.
Differentials: The following are common causes of illnesses that present in
similar ways: HSV-1 encephalitis, enterovirus, Legionnaire’s disease,
Rocky Mountain spotted fever, EBV, HHV-6, Japanese encephalitis,
encephalopathy due to systemic illnesses (e.g. subacute bacterial
endocarditis, systemic lupus erythematosus), and drug-induced aseptic
meningitis.
Prevention: Protective clothing and a vaccine is currently under study.
XII.
UAIM: Hand, Foot and Mouth Disease
Case Description: 6 yo male presents with a vague complaint of blurred
vision. His parents state that he has had a recent bout/diagnosis of “hand,
foot and mouth” disease complete with a viral prodrome. Classic
dermatologic lesions were evident. Focal retinal lesions were noted.
Symptoms/Signs: a neurosensory retinal detachment with yellowish-white
exudates at the macula is possible. Retinal findings show thickening of
outer retinal areas and the IS/OS line disruption is noted at the site of
assorted spots. Retinal findings show thickening of outer retinal areas and
the IS/OS line disruption is noted at the site of assorted spots.
Etiology: viral, and specifically may be associated with hand, foot and
mouth disease
Treatment: Supportive, no known treatment
XIII.
Candida Endophtalmitis Beyond Being Immunocompromise
Case Description: 35 yo male presents with decreased acuity the past
week, reluctantly admitting to IV drug use. His exam was significant for an
AC reaction vitreous cells with large clumps of snowballs (string of pearls)
and a poor view of the retina but areas of chorioretinitis noted.
Symptoms/Signs: AC reaction and vitreous cells with large clumps of
snowballs (string of pearls) and a poor view of the retina but areas of
chorioretinitis noted. The chorioretinal findings precede the AC and vtireous
inflammation.
Etiology Candida albicans (yeast) infection from endogenous
(hematogenous route) or exogenous sources. Immunocompromised or
suppressed sates are a risk.
Differentials: The differential diagnosis of Candida endophthalmitis includes
toxoplasmic retinochoroiditis, which exhibits posterior pole lesions that can
appear yellow-white with fluffy borders and range in size from small cottonwool spots to several disc diameters wide. Candida vitreous snowball
lesions may also resemble pars planitis.
Treatment: Treated with pars plana vitrectomy and intravitreal Amphotericin
B and 4-6 weeks of Voriconazole (watch for toxicity) Other agents include:
Fluconazole, Posaconazole and Echinocandins (Caspofungin). IV
antifungals may be also necessary.
XIV.
Acute Retinal Necrosis: Not Just with HZV
Case Description: 80 white female presented with reduced acuity for
several weeks following a bout with the shingles. Her exam showed
moderate cells in the vitreous and areas of peripheral retinal whitening and
vascular occlusion.
Symptoms/Signs: Characterized by large areas of retinal whitening and
necrosis that spreads centripetally with a high rate of accompanying
detachment and vascular occlusion.
Etiology: A rare presentation of herpetic or other viral disease; varicella
zoster is most common cause, but possible in HSV, EBV, CMV infections.
PCR analysis of the vitreous is confirmatory, but diagnosis is generally
made by clinical assessment.
Treatment: includes IV acyclovir 10-15mg/kg TID for 5-10 days followed by
oral regimen for 6-12 weeks. Intra-vitreal injection of Foscarnet or
Ganciclovir can be considered.
XV.
Fuch’s Heterochromia and the Rubella Scare
Case Description: 73 yo male presents for a routine evaluation with a
history of retinal detachment repair and a difference in eye color since
childhood. He is currently bothered by floaters and notes that he
periodically is treated for iritis. Cells are noted in the anterior vitreous. He
has Fuch’s Heterochromia and his vitreous tap confirms rubella.
Symptoms/Signs: Features include heterochromia, iritis, stellate KPs,
cataracts (PSCs are most common) and difficult to control glaucoma.
Etiology: No diagnostic test for Fuch’s currently exist. Rubella is a single
strand RNA virus usually seen in the congenital form with the triad of heart
defects, hearing loss and eye findings. Vaccine (1969) reduced incidence
significantly. Associated sometimes with toxoplasmosis, herpes simplex,
CMV and rubella.
Differentials: Possner Schlosmann syndrome, congenital Horner’s,
Waadenburg syndrome, oculodermal melanosis, diffuse melanoma of the
iris, and siderosis.
Treatment: Referral is necessary to rule out associated disease(s).
Vitrectomy with PCR testing is sometimes revealing. Glaucoma is often
difficult to treat. Drainage devices and filters (poorer prognosis) are
sometimes required. Caution: Do not treat iritis aggressively. However, a
trial of steroids may aid in the differentials such as Posner Schlossman
syndrome. Cells/flare that linger are not that detrimental (due to blood
aqueous barrier rather than direct inflammation).
REFERENCES
1. Wills Eye Institute 5 Minute Ophthalmology Consult, Wolters
Kluwer/Lippincott Williams & Wilkins, 2012.
2. The Wills Manual: Office and Emergency Room Diagnosis and
Treatment of Eye Disease, 6th Edition, Wolters Kluwer/Lippincott
Williams & Wilkins, 2012.
3. Flashing Lights A Warning, The Canadian Journal of Diagnosis,
November, 2002.
4. Disease & Conditions: Patent Foramen Ovale, Cleveland Clinic, 2012
5. American Academy of Ophthalmology, EyeWiki (West Nile Virus,
Fuch’s Heterochromia Iridocyclitis and Candida Endophthalmitis)